Endocrine System Structure and Hormones — NEET Biology
📚 Practice ConceptThere are special chemicals which act as hormones and provide chemical coordination, integration and regulation in the human body. These hormones regulate metabolism, growth and development of our organs, the endocrine glands or certain cells. The endocrine system is composed of hypothalamus, pituitary and pineal, thyroid, adrenal, pancreas, parathyroid, thymus and gonads (testis and ovary). In addition to these, some other organs, e.g., gastrointestinal tract, kidney, heart etc., also produce hormones. The pituitary gland is divided into three major parts, which are called as pars distalis, pars intermedia and pars nervosa. Pars distalis produces six trophic hormones. Pars intermedia secretes
Which of the following statements about hormone-producing structures are correct? S1. Pituitary, thyroid, adrenal, pancreas, and gonads are examples of organised endocrine glands. S2. The gastrointestinal tract contains diffuse hormone-producing cells, distinct from classical endocrine glands. S3. Organs like the heart and kidney are not typically considered part of the endocrine system despite producing hormones. S4. A composite gland like the pancreas functions solely as an endocrine gland, secreting hormones. S5. The modern definition of hormones expands the scope beyond chemicals produced only by organised endocrine glands.
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